CR8449-1000

Overview

The CR8449-1000 is a general-purpose current sense transformer manufactured by CR Magnetics Inc. It features a non-invasive solid core design with a 50 A current rating and a 1000:1 turns ratio. The device operates within a frequency range of 20 Hz to 1 kHz and has a DC resistance of 32 Ohms. It utilizes wire leads for termination and is suitable for through-hole or inline mounting configurations.

Feature Summary

• Non-invasive solid core construction for direct conductor insertion
• High isolation voltage capability up to 11.6 V RMS secondary output
• Wide frequency response supporting 20 Hz to 1 kHz operations
• Standardized 1000:1 current transformation ratio for precise sensing

Applications

• Industrial motor drive current monitoring
• Power supply feedback loop sensing
• Inverter and converter protection circuits
• General purpose AC current measurement systems

Procurement Notes

Verify the specific lead style and core configuration required for your assembly, as the CR8449 series may offer variations in terminal type. Confirm that the 50 A primary rating aligns with your maximum operational current to prevent saturation. Ensure the 20 Hz lower frequency limit meets your application's signal requirements. Cross-reference the UL file number E131668 for compliance documentation needs.

Selection Notes

Select this component when a non-invasive sensing method is preferred over shunt resistors to maintain galvanic isolation. The solid core design simplifies installation compared to split-core alternatives. Consider the 32 Ohm secondary impedance when designing the burden resistor network. This model is appropriate for applications requiring robust performance across the 20 Hz to 1 kHz bandwidth without complex calibration.

Part Context

This part belongs to the CR8449 series of current sense transformers from CR Magnetics Inc. The series is characterized by its solid core architecture and high reliability for industrial environments. It complements other models like the CR8349 series, offering similar electrical characteristics but potentially differing in mechanical packaging or specific terminal configurations.

Replacement Considerations

The CR8349-1000-N is a documented alternative within the same manufacturer line, sharing identical electrical specifications including the 50 A rating and 1000:1 ratio. Verify mechanical dimensions and lead styles before substitution to ensure board compatibility.